CGAL users discussion list

[Marco Attene <>]

Dear Qianqian,

you may try to load your non-manifold OFF file in ReMESH 
(http://remesh.sourceforge.net). It should automatically fix the 
topology while loading, then you just have to save it back and you are done.
Hope it helps.

best,
marco


Pierre Alliez ha scritto:
> dear Qianqian,
>
> Apparently Matlab's marching cubes algorithm does not provide 
> guarantees about manifold-ness of the output mesh. I do not really 
> know what wrong in your mesh but it can be anything among:
> - one edge sharing more than two faces,
> - one vertex having more than one umbrella,
> - some duplicate faces,
> - etc.
>
> although it is always possible to fix a non-manifold mesh through 
> cutting and/or removing duplicated faces - it is not a well-defined 
> problem - the best is to go with a method with guarantees.
>
> it is possible that CGAL will provide in the next release a 3D mesh 
> generator which allows you to bypass the MC+decimation stage and 
> generates as output a mesh with guaranteed properties.
>
> pierre


--
--
----------------------------------------------------------

Marco Attene
Istituto di Matematica Applicata e Tecnologie Informatiche
Consiglio Nazionale delle Ricerche
Via de Marini 6 - 16149 - Genova - ITALY

Tel. +39(0)106475691
Fax. +39(0)106475660

----------------------------------------------------------